Here is the full list of all 20 It Takes Two achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Now look who's extinct!
Again? Keep track of your kids!
Guess it was time to cash out.
Choo Choo!
They had no way out.
All minigames found!
The truth was out there all along!
You did it! CO-LLA-BO-RATION!
You reached a higher state of mind. Or at least some peace and quiet.
Release that tension at the root level.
Don't feed the animals! Or do, they're adorable.
Scurvy! Ye look smashing, captain!
Took things a bit too far, didn't you?
Helltower? More like hello-from-up-here-tower!
Breathe some wind into your ocarina, my skyward princess!
Isn't it pretty? That's going on the fridge.
Put on a show and die trying.
Shoot for the stars, literally.
Self-inflicted paparazzi.
It takes two to… torture.